Journal of Organometallic Chemistry
The large stereoregular phenyltrimethylsiloxysiloxane macrocycles of general formula [PhSi(OSiMe3)O]n (n=6 and 12) have been selectively obtained with high yields by trimethylsilylation of cage-like oligophenylmetallasiloxanes (OPMS) which we described earlier. The compounds 3 (n=6) and 4 (n=12) have been characterized by NMR-spectroscopy method and by single crystal X-ray analysis. This investigation showed unambiguously that the siloxane macrocycles keep their size and configuration (the same as in the initial OPMS) during the trimethylsilylation. Thus a synthetic route for obtaining large stereoregular siloxane macrocycles has been developed.
Schchegolikhina, O. I.; Igonin, V. A.; Molodtsova, Yulia A.; Pozdniakova, Yu. A.; Zhdanov, Alexandr A.; Strelkova, T. V.; and Lindeman, Sergey V., "Synthesis and Characterization of Large Stereoregular Organosiloxane Cycles" (1998). Chemistry Faculty Research and Publications. 696.